Does this model represent a compound? Explain your answer.

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

Which feature would you expect to find in a population in which sexual selection depends on male competition?

The cell membrane controls what enters and leaves the cell. which of the structures in the diagram below is the cell membrane? — f о